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Nitrate Ion Effects On Uranium Chemistry In The Tributylphosphate-Dodecane System, Amber Dawn Wright
Nitrate Ion Effects On Uranium Chemistry In The Tributylphosphate-Dodecane System, Amber Dawn Wright
UNLV Retrospective Theses & Dissertations
Understanding the role of nitrate in the speciation of actinides is important in order to determine the necessary data for extraction modeling of the UREX process. The focus of this project is on the fundamental chemistry of uranium (U) in the tributyl phosphate (TBP) extraction system, with emphasis on the effect of nitrate on actinyl speciation. Speciation calculations can be performed if stability and solubility constants for the chemical species formed under the examined conditions are known. The stability constant of the uranyl-TBP complex was evaluated under a variety of conditions. The variables were nitric acid, uranyl, total nitrate concentration, …
An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky
An Assessment Of The Potential To Use Water Chemistry Parameters To Define Ground Water Flow Pathways At Grand Canyon National Park, Arizona, Kim Alison Zukosky
UNLV Retrospective Theses & Dissertations
The purpose of this study is to assess the potential to use water chemistry parameters to determine ground water flow pathways at the south rim of Grand Canyon National Park, Arizona. South rim spring, ground, and surface waters and one north rim spring were sampled from September 1992 through September 1993. Field measurements (pH, electrical conductivity, alkalinity, temperature, total dissolved solids, and dissolved oxygen), major anion (fluoride, chloride, bromide, nitrate, phosphate, and sulfate) concentrations, selected trace element concentrations, and the ratios of the stable isotopes of oxygen and hydrogen. Major anion, trace element, and field measurement data were analyzed using …